File:Rock salt (halitite) (F1 Salt Bed, Upper Silurian; Fairport Mine, Ohio, USA) (16221339164).jpg
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[edit]DescriptionRock salt (halitite) (F1 Salt Bed, Upper Silurian; Fairport Mine, Ohio, USA) (16221339164).jpg |
Rock salt (sedimentary halitite) from the Silurian of Ohio, USA. (8.3 cm across) Sedimentary rocks form by the solidification of loose sediments. Loose sediments become hard rocks by the processes of deposition, burial, compaction, dewatering, and cementation. There are three categories of sedimentary rocks: 1) Siliciclastic sedimentary rocks form by the solidification of sediments produced by weathering & erosion of any previously existing rocks. 2) Biogenic sedimentary rocks form by the solidification of sediments that were once-living organisms (plants, animals, micro-organisms). 3) Chemical sedimentary rocks form by the solidification of sediments formed by inorganic chemical reactions. Most sedimentary rocks have a clastic texture, but some are crystalline. Rock salt is a chemical sedimentary rock that forms by the evaporation of water (usually seawater) and the precipitation of dissolved minerals. Chemical sedimentary rocks that form by the evaporation of water are called evaporites. Rock salt & rock gypsum are the two most common evaporites. Rock salt is composed of the mineral halite (NaCl - sodium chloride). It ranges in color from clearish to grayish to orangish-brown, but sometimes has other colors, such as blue. It has a strongly salty taste, is often coarsely-crystalline, and is relatively soft (H = 2.5). Rock salt is also known as halitite, which refers to sedimentary evaporite deposits composed of halite (NaCl). Halitite has also been used in the geologic literature to refer specifically to rock salt that's been contact metamorphosed by igneous intrusions. Stratigraphy: F1 Salt Bed, ~mid-Cayugan Series, ~mid-Upper Silurian Locality: Fairport Mine, northeastern Ohio, USA |
Date | |
Source | Rock salt (halitite) (F1 Salt Bed, Upper Silurian; Fairport Mine, Ohio, USA) |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/16221339164. It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
6 December 2019
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:37, 6 December 2019 | 971 × 597 (807 KB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Width | 1,029 px |
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Height | 647 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 375 dpi |
Vertical resolution | 375 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 21:39, 15 March 2015 |
Exif version | 2.21 |
Color space | sRGB |
Unique ID of original document | 7F4881F59E2FDF56CE60AC34B8480D9D |
Date and time of digitizing | 10:32, 15 March 2015 |
Date metadata was last modified | 17:39, 15 March 2015 |